Algebra crossword puzzle

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Across
  1. 2. A chart used to represent data
  2. 5. one math statement
  3. 7. Reduce
  4. 9. Difference between the largest and smallest numbers in a data set
  5. 10. a symbol or letter that represents a value
Down
  1. 1. number Numbers used for counting
  2. 3. Expression of different variables
  3. 4. X variable in a function
  4. 6. Number that shows the steepness and direction of the line.
  5. 8. Two lines that never intersect